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Modbus协议在工业现场使用比较频繁，为方便手机调试，在android上做了个ModbusTcp主站功能。
1：使用说明
作为主站，需要连接从站，因此需要配置从站IP、端口以及协议中从站地址。
连接成功后这些配置就不能修改。
偏移是需要读取或者写入的起始地址。
长度读取或者写入的总长度。
后边的长度按键是，为写入准备输入数据区数据。一般步骤先设定需要写入的长度，当然根据实际情况可以同时设置偏移量；在点击长度，就会在写入区生成需要写入长度项目，然后设定需要写入的值。
读取按键，按设定的地址和长度以及功能读取器从站数据，读回来的数据，如果是是3、4功能号的，选择了十六进制，就按十六进制展示；否则按十进制展示。
写入按键，从偏移量作为基地址写入从站。
清理按键是清理写入区内输入的内容，清理不会写入到从站。
“----->”传递按键，在有些情况下，可以直接把读取的实际传递到写入区，然后修改部分数据后，直接写入到从站。这样就不需要逐条输入，方便操作。
2：程序说明
页面上在读取展示区和写入输入区是两个ListView组件。读区的item是两个TextView，写入输入区是一个TextView和一个EditText。
ModbusTcp功能直接使用的是Modbus4Android的jar包。核心功能代码如下
private void modbusInit(String ip, int port) {
ModbusReq.getInstance().setParam(new ModbusParam()
.setHost(ip)
.setPort(port)
.setEncapsulated(false)
.setKeepAlive(true)
.setTimeout(2000)
.setRetries(0))
.init(new OnRequestBack() {
@Override
public void onSuccess(String s) {
Log.d(TAG, "onSuccess " + s);
Intent i = new Intent("notifyText");
i.putExtra("act", "100");
i.putExtra("status", true);
i.putExtra("Message", "连接成功");
LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(i);
}
@Override
public void onFailed(String msg) {
Log.d(TAG, "onFailed " + msg);
Intent i = new Intent("notifyText");
i.putExtra("act", "0");
i.putExtra("status", false);
i.putExtra("Message", "连接失败");
LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(i);
}
});
}
public void readCoil(int slaveid, int start, int len) {
ModbusReq.getInstance().readCoil(new OnRequestBack() {
@Override
public void onSuccess(boolean[] booleen) {
Log.d(TAG, "readCoil onSuccess " + Arrays.toString(booleen));
Intent i = new Intent("notifyText");
i.putExtra("act", "1");
i.putExtra("status", true);
i.putExtra("Message", Arrays.toString(booleen));
LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(i);
}
@Override
public void onFailed(String msg) {
Log.e(TAG, "readCoil onFailed " + msg);
Intent i = new Intent("notifyText");
i.putExtra("act", "1");
i.putExtra("status", false);
i.putExtra("Message", "读取线圈失败");
LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(i);
}
}, slaveid, start, len);
}
public void readDiscreteInput(int slaveid, int start, int len) {
ModbusReq.getInstance().readDiscreteInput(new OnRequestBack() {
@Override
public void onSuccess(boolean[] booleen) {
Log.d(TAG, "readDiscreteInput onSuccess " + Arrays.toString(booleen));
Intent i = new Intent("notifyText");
i.putExtra("act", "2");
i.putExtra("status", true);
i.putExtra("Message", Arrays.toString(booleen));
LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(i);
}
@Override
public void onFailed(String msg) {
Log.e(TAG, "readDiscreteInput onFailed " + msg);
Intent i = new Intent("notifyText");
i.putExtra("act", "2");
i.putExtra("status", false);
i.putExtra("Message", "读取线圈失败");
LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(i);
}
}, slaveid, start, len);
}
public void readHoldingRegisters(int slaveid, int start, int len) {
//readHoldingRegisters
ModbusReq.getInstance().readHoldingRegisters(new OnRequestBack() {
@Override
public void onSuccess(short[] data) {
Log.d(TAG, "readHoldingRegisters onSuccess " + Arrays.toString(data));
Intent i = new Intent("notifyText");
i.putExtra("act", "3");
i.putExtra("status", true);
i.putExtra("Message", Arrays.toString(data));
LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(i);
}
@Override
public void onFailed(String msg) {
Log.e(TAG, "readHoldingRegisters onFailed " + msg);
Intent i = new Intent("notifyText");
i.putExtra("act", "3");
i.putExtra("status", false);
i.putExtra("Message", "读取线圈失败");
LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(i);
}
}, slaveid, start, len);
}
public void readInputRegisters(int slaveid, int start, int len) {
ModbusReq.getInstance().readInputRegisters(new OnRequestBack() {
@Override
public void onSuccess(short[] data) {
Log.d(TAG, "readInputRegisters onSuccess " + Arrays.toString(data));
Intent i = new Intent("notifyText");
i.putExtra("act", "4");
i.putExtra("status", true);
i.putExtra("Message", Arrays.toString(data));
LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(i);
}
@Override
public void onFailed(String msg) {
Log.e(TAG, "readInputRegisters onFailed " + msg);
Intent i = new Intent("notifyText");
i.putExtra("act", "4");
i.putExtra("status", false);
i.putExtra("Message", "读取线圈失败");
LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(i);
}
}, slaveid, start, len);
}
public void writeCoil(int slaveid, int start, boolean value) {
ModbusReq.getInstance().writeCoil(new OnRequestBack() {
@Override
public void onSuccess(String s) {
Log.e(TAG, "writeCoil onSuccess " + s);
}
@Override
public void onFailed(String msg) {
Log.e(TAG, "writeCoil onFailed " + msg);
Intent i = new Intent("notifyText");
i.putExtra("act", "5");
i.putExtra("status", false);
i.putExtra("Message", "msg");
LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(i);
}
}, slaveid, start, value);
}
public void writeRegister(int slaveid, int start, int value) {
ModbusReq.getInstance().writeRegister(new OnRequestBack() {
@Override
public void onSuccess(String s) {
Log.e(TAG, "writeRegister onSuccess " + s);
}
@Override
public void onFailed(String msg) {
Log.e(TAG, "writeRegister onFailed " + msg);
Intent i = new Intent("notifyText");
i.putExtra("act", "6");
i.putExtra("status", false);
i.putExtra("Message", "msg");
LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(i);
}
}, slaveid, start, value);
}
public void writeRegisters(int slaveid, int start, short[] value) {
ModbusReq.getInstance().writeRegisters(new OnRequestBack() {
@Override
public void onSuccess(String s) {
Log.e(TAG, "writeRegisters onSuccess " + s);
}
@Override
public void onFailed(String msg) {
Log.e(TAG, "writeRegisters onFailed " + msg);
Intent i = new Intent("notifyText");
i.putExtra("act", "16");
i.putExtra("status", false);
i.putExtra("Message", "msg");
LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(i);
}
}, slaveid, start, value);
}
读函数把成功和失败都用广播播放出去。
写只把失败广播出去。
3：测试效果
程序功能基本满足现场测试需要，方便随时联调。在测试过程中出现程序闪退，经跟踪，闪退异常原因“java.lang.IndexOutOfBoundsException: Index: 99, Size: 10”，是ListView的adapter在更新数据时，老数据操作未完成引起。经修改程序后，未出现闪退情况。
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